If you want your recipes to work on Google Assistant, Google requires that the recipeIngredient and recipeInstructions properties be used in your markup. Adding these properties to your recipes will enable recipe guidance, which will walk the user through step-by-step instructions on how to make the recipe.

In addition, Google is now recommending the following recipe properties:

Keywords: Add other terms for your recipe such as the season (“summer”), the holiday (“Halloween,” “Diwali”), the special event (“wedding,” “birthday”) or other descriptors (“quick,” “budget,” “authentic”).